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;IPC-7351C calculation formula will be: Pad diameter = Hole size + 2*Min. annular ring(Min 0.2mm), or = Hole size * pad-to-hole-ratio, whichever is larger. But calculated result will be
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/ipc7251_topic1798.html
* pad-to-hole-ratio , whichever is larger. But calculated result will be different between above two calculation method, IPC-7351C defined a proportional annular ring, IPC-2221B defined same size annular ring even though
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* pad-to-hole-ratio , whichever is larger. But calculated result will be different between above two calculation method, IPC-7351C defined a proportional annular ring, IPC-2221B defined same size annular ring even though
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/ipc7251_topic1798_post7361.html
: The calculation formula below for pad diameter is different with IPC-2221B 9.1.1, how to set "pad to hole ratio" and "minimum annular ring"? http
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: Stencil Aperture Design Stencil Aperture Design : Aspect ratio is one thing. Area... Author: Martijn KaandorpSubject: 1136Posted: 02 Nov 2016 at 8:24amAspect ratio is one thing
